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Printed wiring board and display apparatus

Inactive Publication Date: 2008-08-26
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]An object of the present invention is to provide a printed wiring board allowing circuit parts poor in moisture resistance to be stably operated for a long-period of time, and to provide a display apparatus capable of stably displaying pictures for a long-period of time by using the printed wiring board.

Problems solved by technology

The EL display apparatus having the above structure is disadvantageous in that since the insulating substrate of the printed wiring board is made from an organic synthetic resin, moisture is easy to permeate the printed wiring board and to reach the EL display device which is generally poor in moisture resistance, with a result that the EL display apparatus is difficult to stably display pictures for a long-period of time.

Method used

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  • Printed wiring board and display apparatus
  • Printed wiring board and display apparatus
  • Printed wiring board and display apparatus

Examples

Experimental program
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first embodiment

[0031]A method of fabricating a printed wiring board and an EL display apparatus will be described with reference to FIGS. 1 to 6C. As shown in FIG. 4A, a glass substrate 11 of 1.1 mm in thickness made from a no-alkali glass is prepared, and through-holes 13 are formed in the glass substrate 11 at positions corresponding to those of anode electrodes and cathode electrodes necessary for a simple matrix type EL display apparatus by turning a diamond drill 12 or turning the diamond drill 12 while imparting ultrasonic waves to the diamond drill 12.

[0032]The diamond drill 12 is formed by electrodepositing fine particles of diamond on the surface of an ultra-high hardness steel containing typically Cr, Mo, W, Mn, Ni, and Ti, or sintering a mixture of a powder of the ultra-high hardness steel and fine particles of diamond. The frequency and energy of ultrasonic waves are set at about 20 kHz and 500 W, respectively. The turning of the diamond drill 12 with ultrasonic waves imparted to the ...

second embodiment

[0040]A method of fabricating a printed wiring board and an EL display apparatus according to the present invention will be described with reference to FIGS. 7 to 9D.

[0041]First, as shown in FIG. 8A, a glass substrate 41 of 1.1 mm in thickness made from a no-alkali glass is prepared. Epoxy resin films with copper foils are press-bonded on both surfaces of the glass substrate 41 by using hot rolls 42. In this way, an epoxy resin film 43 of 40 μm in thickness and a copper foil 44 of 18 μm in thickness provided thereon are formed overall on each surface of the glass substrate 41. Then, as shown in FIG. 8B, portions of the copper foils 44, located at positions where through-holes corresponding to anode electrodes and cathode electrodes necessary for a simple matrix type EL display apparatus are to be formed, are removed by etching, or the surfaces of the copper foils 44 are overall removed by etching.

[0042]As shown in FIG. 8C, like the fabrication step in the first embodiment shown in F...

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Abstract

A printed wiring board includes a glass substrate provided with through-holes, conductive patterns provided on both surfaces of said glass substrate in such a manner as to be made conductive to each other via said through-holes, and a sealing member composed of a silver paste containing an epoxy resin as a binder provided to fill said through-holes. This printed wiring board is advantageous in that circuit parts can be connected to each other without use of any planar special region and moisture does not reach the circuit parts through the printed wiring board. A display apparatus capable of stably displaying pictures for a long-period of time is provided by using the printed wiring board.

Description

RELATED APPLICATION DATA[0001]The present application claims priority to Japanese Application No. P11-271950 filed Sep. 27, 1999, which application is incorporated herein by reference to the extent permitted by law.BACKGROUND OF THE INVENTION[0002]The present invention relates to a printed wiring board including conductive patterns, and a display apparatus including a display device and a drive component for driving the display device.[0003]As one structure of electroluminescence (EL) display apparatus, there has been known a structure wherein a display device is packaged by using a protective glass board, which protects the display device and allows light emitted from the display device to pass therethrough, and a printed wiring board which includes an insulating substrate made from an organic synthetic resin and to which the display device and a drive component therefor are electrically connected.[0004]The EL display apparatus having the above structure is disadvantageous in that ...

Claims

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Application Information

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IPC IPC(8): H05K7/02G09F9/30G09F9/00H01L27/32H01L51/52H05B33/02H05K1/03H05K1/09H05K1/16H05K3/00H05K3/04H05K3/10H05K3/24H05K3/38H05K3/40H05K3/42H05K3/46
CPCH05K3/0094H05K3/4061H01L27/3297H05K2203/0554H05K1/0306H05K1/0366H05K1/095H05K1/16H05K3/048H05K3/108H05K3/245H05K3/388H05K3/427H05K3/4605H05K3/467H05K2201/0317H05K2201/0355H05K2201/0959H05K2201/10128H05K2203/0191H01L51/5237H05K3/426H10K59/179H10K50/8423
Inventor MATSUDA, YOSHINARISUZUKI, YOSHIOODAKE, RYOTAASAI, NOBUTOSHI
Owner SONY CORP
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